STRUCTURED barley population of 103 wild barley accession
……and 19 spring barley cultivars was used to identify quantitative
trait loci (QTLs) for salt tolerance traits by means of an association
mapping approach using 660 DArT markers. In this investigation
barley accession and spring barley cultivars were employed in a twoyear
greenhouse project having a completely randomized design
involving four irrigation water treatments having different salinities
and twice replicated. Measurement parameters included grain yield
per plant, straw weight, relative water content, chlorophyll content,
Na+, K+ and salt tolerance %. Several statistical models were
compared, the K-model was less spurious background associations,
in this model 61 QTLs were detected under both of control and salt
stress conditions (1000, 3000 and 5000 ppm NaCl of water
irrigation) over whole barley genome for yield, straw weight, relative
water content, chlorophyll content , Na+, K+ and salt tolerance %.
Among of these QTLs, 21 detected under control, phenotypic
variations explained by these QTLs, were ranged from 8.02 in N+ to
25.67% of the total variation in K+. 40 QTLs were identified under
saline conditions and the phenotypic variation explained by each
main effect QTLs (M-QTL) ranged from 4.65 % in chlorophyll
content at 3000 ppm condition to 28.13 % in ST at 5000 ppm
condition. The genomic regions that harbor QTLs for Na+, salt
tolerance and related traits on chromosome 1H, 2H and 7H in our
study can be used for targeting candidate gene (s) for salt tolerance
of barley.